909982018-10-29Towards a Structure and Function of Ecosystems (SAFE) Smallsat ConstellationActiveOct 2016Sep 2019<p>This project will develop the scientific and technical underpinnings of a SmallSat &nbsp;constellation to make high-spatial resolution measurements of forest structure. &nbsp;The bulk of the effort of this project is high resolution imaging processing development, 2) optical design, and 3) Science Traceability Matrix and project concept development. Objectives 1 and 2 are needed to overcome diffraction limit issues of SmallSat-sized telescopes to get to the required resolution.&nbsp; This project builds upon a recent Science Innovation Fund project to inform technical requirements for a SmallSat high spatial resolution instrument to measure vegetation structure and scene shadow fraction.</p><p>Our approach utilizes the well established stereogrammetric analyses now being used in a variety of scientific applications. This requires high resolution stereo image data in order to produce the point clouds that characterize the 3D canopy structure, This information can then be used in simple models to estimate location and fraction of scene shadows. While simple in concept the practical development of a low cost, high resolution instrument is challenging. &nbsp;We will explore the possibility of free-form optics plus super resolution software approaches for this instrument concept. We also will develop a science traceability matrix by providing technical capabilities in light of science requirements.</p><p>Recent developments of estimating vegetation productivity from space using relatively low resolution systems can be enhanced by high resolution measurements of forest productivity and structure.&nbsp; This work focused on developing a low cost method for inferring 3D forest canopy height models.</p>23532468Science Instruments, Observatories, and Sensor Systems32998.1Remote Sensing Instruments and Sensors38178.1.1Detectors and Focal Planes38198.1.3Optical Components33008.2Observatories38238.2.1Mirror Systems324911Modeling, Simulation, Information Technology and Processing341111.2Modeling387311.2.1Software Modeling and Model Checking394211.2.4Science Modeling341211.3Simulation341311.4Information Processing395611.4.4Collaborative Science and Engineering395711.4.5Advanced Mission SystemsEarthFoundational KnowledgeProjected Mission (Pull)Center Independent Research & Development: GSFC IRADMission Support DirectorateGSFCIndustryGreenbeltMDMarylandMatthew J McgillWilliam E CutlipKenneth J RansonPhilip W DabneyKarl HuemmrichJacqueline J Le Moigne-stewartJoel MccorkelGuoqing Sunhttp://sciences.gsfc.nasa.gov/sed/47776Determining the fraction of sunlit and shaded scene compnents enablesmore accurate estimates of forest productivity and storedImageDetermining the fraction of sunlit and shaded scene compnents enablesmore accurate estimates of forest productivity and stored carbon.34547https://techport.nasa.gov/file/3454787088